export function stringToByte(str) {
  let bytes = new Array();
  let len, c;
  len = str.length;
  for(let i = 0; i < len; i++) {
    c = str.charCodeAt(i);
    if(c >= 0x010000 && c <= 0x10FFFF) {
      bytes.push(((c >> 18) & 0x07) | 0xF0);
      bytes.push(((c >> 12) & 0x3F) | 0x80);
      bytes.push(((c >> 6) & 0x3F) | 0x80);
      bytes.push((c & 0x3F) | 0x80);
    } else if(c >= 0x000800 && c <= 0x00FFFF) {
      bytes.push(((c >> 12) & 0x0F) | 0xE0);
      bytes.push(((c >> 6) & 0x3F) | 0x80);
      bytes.push((c & 0x3F) | 0x80);
    } else if(c >= 0x000080 && c <= 0x0007FF) {
      bytes.push(((c >> 6) & 0x1F) | 0xC0);
      bytes.push((c & 0x3F) | 0x80);
    } else {
      bytes.push(c & 0xFF);
    }
  }
  return bytes;
}
export function byteToString(arr) {
  if(typeof arr === 'string') {
    return arr;
  }
  let str = '',
    _arr = arr;
  for(let i = 0; i < _arr.length; i++) {
    let one = _arr[i].toString(2),
      v = one.match(/^1+?(?=0)/);
    if(v && one.length == 8) {
      let bytesLength = v[0].length;
      let store = _arr[i].toString(2).slice(7 - bytesLength);
      for(let st = 1; st < bytesLength; st++) {
        store += _arr[st + i].toString(2).slice(2);
      }
      str += String.fromCharCode(parseInt(store, 2));
      i += bytesLength - 1;
    } else {
      str += String.fromCharCode(_arr[i]);
    }
  }
  return str;
}
export function encode(bytes){
  let len = bytes.length;
  for (let i=0; i<len;i++){
    bytes[i] = bytes[i] ^ 10;
  }
  return bytes
}
